Rotary valve for gas-engines.



R. SCHMITZ.

ROTARY VALVE FORGAS ENGINES.

APPLICATION FILED DCT.22, I915.

Patented Oct. 15, 1918.

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R. SCHMITZ.

ROTARY VALVE FOR GAS ENGINES.

APPLICATION FILED OCT. 22, I915. 1,281,423. Patented 0ct.15, 1918.

3 SHEETS-SHEET 2.

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R. SCHMITZ.

ROTARY VALVE FOR GAS ENGINES.

APPLICATION FILED 001.22.19l5.

1,281,423. Patented 0m. 15, 1918.

3 SHEETS-SHEET 3.

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valve disk.

P vide with RICHARD SGHMITZ, OF CHICAGO, ILLINOIS, ASSIGNOR TO SCHMITZ ENGINE COMPANY,

A CORPORATION OF ROTARY VALVE FOR SOUTH DAKOTA.

GAS-ENGINES.

To all whom it may concern:

'Be it known that I, RICHARD SCHMITZ, a citizen of the United States, residing at Chicago, in the county of Cook and Illinois have invented a certain new and useful lmprovement in Rotary Valves for GasEngines, of which specification.

My invention relates to that class of engines which are designed to do away with puppet valves with their many objectionable features and substitute in the place thereof a noiseless rotary valve, and to provide a construction which will permita single valve to perform the necessary funcand has for its furtion for two cylinders,

ther object to provide for the inlet ports to be on one side of the cylinder and the exhaust ports on the other, and to cause the same mechanism which rotates the one valve to rotate the other. My invention has for its further object to provide for a quick opening and closing of the valves and to provide a construction which will relieve the valve from the necessity of a pressure plate with the diificulties which are present where one is employed.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanyin drawings, which are hereunto annexed an are a part of this specification, in which:

"Figurel is a side elevation of an engine provided with my improved valve, part of it being shown in section, the plate and outer valve disk being removed to show the valve proper.

Fig. 2 is a vertical sectional view on the line w-w in Fig. 3, a portion of the valve structure being shown in elevation.

Fig. 3 is a horizontal cross section, upper half being on line a-a in Fig. 1, t e lower half on line b--b in Fig. 1, or the view may be considered as taken on line c& in Fig. 2.

1 Fig. 1 is a valve disk.

Fig. 5 is a detail view showing the inner detail view showing the outer Similar reference numerals refer to-simidescription.

As shown in the drawings, the engine is cylin ers 1 n .2, ich re Specification of Letters Patent.

State of the following is a.

bearings 12 and 13 Patented Oct. 15, 1918.

Application filed October 22, 1915. Serial No. 57,323.

side and exhaust ports on the opposite si and a crank case 3, a crank 4L and piston 5. 6 indicates the connecting rods, the crank being carried in bearings In the center of the crank is mounted a worm wheel orgear 9, which engages a worm 10 mounted upon the lower valve shaft 11, which is carried in formed in the side walls of the crank case 3. 15 and 16 indicate eccentrics which are engaged by eccentric rods 17 and 18, the latter being provided with straps 19 and 20 at their lower ends, which are fitted to the eccentrics 15 and 16. The upper ends of the eccentric rods 17 and 18 are secured to cranks 22 and 23 formed on the upper valve rod 21. This upper valve rod has mounted upon its outer ends disk valves 24:, which are provided with outwardly extending hubs 25, and are journaled in valve covers 26, which are secured to the side walls of the cylinders by bolts 27 or in any other convenient manner.

The valve rod 21 also has fixedly secured to it adjacenteach end a gear 28, which is adapted to engage a pinion 29 mounted upon a shaft 30, which is journaled in 9. lug 31 formed on the cylinder wall. engages the teeth of an internal gear 32, which is out upon the inner wall of the inner annular valve 33. This valve is provided with a port opening 3 1 which registers with the ports or passages leading to the cylinders as clearlyshown in Fig. 3, it being apparent to persons skilled in the art that the rotation of the valve brings the opening 34: in register with the ports leading to the interior of the two adjacent cylinders, and is fitted with piston rings 35 and 36 of the usual construction, one of which is located in a c'rcumferential groove formed in the periphery of the annular valve, the other, 36, bearing against the external surface of the inner side of the annulus, is held in position by an annular member 37, which is secured in position by means of screws 38, or in any other convenient manner.

The annular valve is fitted to an annular chamber or recess formed in the sidewall of the cylinders and is adapted to fit said chamber loosely, depending on the piston rings 35 and 36 to prevent the leakage of provided with inlet ports on oilie The pinion 29 y gas and. the engagement of theannular will be valve rod 21 turn Will rotate the member 39 with the edge of the valve 33. The structure thus far described is an operative one. My means of securing quick open: ing of the valves and closing of the ports will be next described.

The outer disk valve 24 is provided with a hollow flange 39, which is fitted to an annular recess formed in the inner valve 33. T e outer valve 24 is provided With a port opening 41 of the same size as the port opening 34 of the inner valve member.

I have described the construction for one side only of the the only difference being in the locating of the ports 34 and 41 which obviously must be placed so as to properly time the engine.

he operation of the device is as follows: The rotation of the crank serves to rotate the eccentrics 15 and 16 and these in turn impart a reciprocating motion to the eccentricro'ds 17 and 18, Which cause the upper to be rotated. It will be noted that the construction employed prevents this rod from ever being on a dead center. This rotation of the upper valve rod 21 serves to rotate the valve disk 24 in the same direction that the valve rod 21 is being ro- It will be apparent that the gear 28 rotated with the shaft and will impart its motion to the pinion 29. This in inner valve disk 33 through'the medium of the teeth on the in ita'tions shall appear in opening limiting myself to the ternal gear 32 With the result that the inner '11 move in an opposite direction to that in Which the outer valve disk 24 is moving. 'This enables me to produce quick and closing of the valves.

It Will be apparent "that by duplicating this'construction on the opposite side of the engine cylinders that a similar set of valves will operate the exhaust valves, the said valve being actuated by 21 which and Worm and gear for imparting rotation to the upper valve rod 21, itwill be apparent to persons skilled in the art that many different forms of drive can be utilized for this purpose and I do not Wish to be understood as limiting myself to the eccentrics for accomplishing this result. anges may also be made in the construction of the valves and I desire to be understood as not precise construction except as such limthe claims. aving described my invention What I regard as new and desire to secure by Letshown in the drawings,

n a gas engine having a plurality, of

cylinders, a valve shaft passing between ad- ,ia e ifi" cyl d s adja en the exp o o chamber, there being inlet and exhaust val ports on opposite sides of the secured to the ends of said r valves intermediate the disk valves and the cylinders, means to rotate said annular and disk valves in opposite directions.

2. In a gas engine having a pluralityof cylinders, a valve shaft passing between adjacent cylinders adjacent the explosion chamber, there being inlet and exhaust ports on opposite sides of the cylinders, disk valves secured to the ends of said shaft, annular valves intermediate the disk valves and the cylinders, piston rings which bear against the external surfaces of the inner valve, 'means to prevent the leakage past the annular valve and means to rotate said annular and disk valves in opposite directions.

3. In a and the cylinders, an internal gear'cut upon 3 the annular valves shaft adjacent said mediate gear internal gear and means to said gears.

plnions carried by said annular valves, an interin mesh with the teeth of the and the pinion on the shaft,

rotate said valves and in turn 4. In agas engine having a plurality of cylinders, avalve shaft passing jacent cylinders ch 7 between adadjacent the explosion amber, there being inlet cran v and 0 cause rotation- V shaft to rotate the shaft carrying the eccentrics.

ve, means to prevent theannular'valve, means to rotate said annular and disk valves in opposite directions,

there being a recess in the cylinder Walls in which said annular valves are mounted, and means to hold said annular valves Within said recess.

-6. In a gas engine having a plurality of cylinders, a valve shaft passing between adjacent cylinders adjacent the explosion chamber, there being inlet and exhaust ports on opposite sides of the cylinders, disk valve secured to the ends of said shaft, annular valves intermediate the disk valves and the cylinders, piston rings, which bear against the external surfaces of the inner valve, means to prevent the leakage past the annular valve, means to rotate said annular and disk valves in opposite directions, there being a recess in the cylinder Walls in which said annular valves are mounted, means to hold said annular valves Within Copies of this patent may be obtained for five cents each, by addressing said recess, and valve covers detachably secured to the side Walls of the cylinders.

7. In a gas engine having a plurality of cylinders, a valve shaft passing between adjacent cylinders adjacent the explosion chamber, there being inlet and exhaust ports on opposite sides of the cylinders, disk valves secured to the ends of saidshaft, annular valves intermediate the disk valves and the cylinders, piston rings, Which bear against the external surfaces of the inner valve, means to prevent the leakage past the annular valve, and means to rotate said annular and disk valves in opposite directions, and journal bearings for said valve shaft.

In Witness whereof, I have signed the foregoing specification.

RICHARD SCHMITZ.

the Commissioner of Patents,

Washington, D. 0. 

